Hi All, I have spent a number of days working with the bluetooth stack on the Mac OSX. Its been particularly hard because the packet-decoder is not available. My issue is that while i can open any RFCOMM channel I want. I have trouble with L2CAP. My application is a modification of the sample Server RFCOMM program twisted to open connections with L2CAP. I simply wanted to experiment working with L2CAP. I can open an L2CAP channel with PSM on 1 & 3, but all others fail with a 0xe00002cd error. (This is from either Obj_C or C++). The error is described as #define kIOReturnNotOpen iokit_common_err(0x2cd) // device not open However, I have a device open command preceding the call. Another issue is that the client (or the server application) does not even notice a notification request. The only problem I can think of is something is some how blocking all access on ports other then 1 & 3. Does any one have any experience with this problem? Is there something I am missing? General structure of the app. Setup the server. Define an SPD Start the server. Define the listening notification Start client. Connect to server. See failure. Rinse repeat. And Happy Holidays all! Alex [demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s] _______________________________________________ bluetooth-dev mailing list | bluetooth-dev@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.